Using example schedules, explain how the phantom issue might arise when key-value locking is used. -> Explain how, when used with example schedules, key-value locking may allow the phantom issue to go unnoticed
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Q: Using sample schedules, demonstrate how the phantom issue might occur when key-value locking is…
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Using example schedules, explain how the phantom issue might arise when key-value locking is used. -> Explain how, when used with example schedules, key-value locking may allow the phantom issue to go unnoticed.
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Solved in 4 steps
- List some possible approaches that may be used to ensure that deadlocks are recoverable.Under what condition(s) are you able to prevent the occurrence of a deadlock? List and compare two deadlock-prevention approaches.What is the key difference between trying to avoid a deadlock and trying to prevent one from occurring?
- What are the 4 requirements for a deadlock to occur? Please explain why each one needs to be present for a deadlock, and show why the deadlock would not occur if any are missing?Explain how the phantom problem might develop when key-value locking is utilised using sample schedules. -> Explain how key-value locking may cause the phantom problem to go unreported when utilised with example schedules.A trigger's execution might result in the execution of another action. The depth of nesting in most database systems has a limit. Explain why they would put such a restriction in place.
- Explain, with the help of some sample schedules, how the phantom problem could appear when key-value locking is being used. -> Describe how the phantom problem could go undiscovered when the key-value locking technique is used to example schedules.B: List and describe strategies for handling Deadlock after it occurs.Suppose you're interested in recording the history of changes made to the takes relation. Have any assurances been made that unauthorized database administrators (or those who manage to crack an administrator's password) would be recorded in an audit trail of modifications made by this implementation? Your reply need to include many specifics.
- What exactly is a deadlock? What conditions must exist for a deadlock to occur? Briefly discuss each condition.What are conditions under which a deadlock situation may arise?The follow questions refer to the transaction schedule below, that records bookings of tickets for a harbour cruise. TIME ID TRANSACTION ID OPERATION 1 A Read Tickets left = 10 2 B Read Tickets left = 10 3 B Purchase 8 Tickets 4 A Purchase 6 Tickets 5 6 Using the transaction schedule above, explain the lost update problem Using the transation schedule above, explain how the two-phase locking protocol would prevent the lost update from occurring Using the transaction schedule above, explain the concept of Isolation as it relates to transaction management